mirror of https://gitee.com/openkylin/linux.git
66c56cfa64
We've always had a weird situation around dma_zalloc_coherent. To safely support mapping the allocations to userspace major architectures like x86 and arm have always zeroed allocations from dma_alloc_coherent, but a couple other architectures were missing that zeroing either always or in corner cases. Then later we grew anothe dma_zalloc_coherent interface to explicitly request zeroing, but that just added __GFP_ZERO to the allocation flags, which for some allocators that didn't end up using the page allocator ended up being a no-op and still not zeroing the allocations. So for this merge window I fixed up all remaining architectures to zero the memory in dma_alloc_coherent, and made dma_zalloc_coherent a no-op wrapper around dma_alloc_coherent, which fixes all of the above issues. dma_zalloc_coherent is now pointless and can go away, and Luis helped me writing a cocchinelle script and patch series to kill it, which I think we should apply now just after -rc1 to finally settle these issue. -----BEGIN PGP SIGNATURE----- iQI/BAABCgApFiEEgdbnc3r/njty3Iq9D55TZVIEUYMFAlw6LV0LHGhjaEBsc3Qu ZGUACgkQD55TZVIEUYPd1hAAshbVLVIUg750CQoKD5sk44/IW7klkQUnzcp9ueOY /GIYS/ils8q9DSITAyMJxHKpjt1EEVlavWLvYLlfpkDfLaVGMUJu+zKGaolhU5F6 OuldJKZV6tWrC7zGVl+09y5CAyelVxLyuD09I+QYnHUIO9ljgZHB2+W3ezOFxBRD FjrQRuFY6Xpr1F42zWc4aJrgACffH761pLx3fbJlIs8aEInWKqDbuyL6Lg71BRXh kHKt0DQxFxklyQmqaYyDesujjXUysweAFLNxgN9GSrlWBR8GE3qJpsSrIzjX5k8w WKzbypYqVQepI3zYCN5EoCAoiHBFZXPSNHCoXAH6tHjYwgQ3uoDpzxEKJOEykO4i 1+kcJh3ArQZA/BsMBf3I/CNMsxvBuC3/QKFMcs/7pKx1ABoumSBSIpqB4pG4NU+o fxRBHKjqbILufWKReb2PuRXiPpddwuo0vg70U0FK2aWZrClRYEpBdExPKrBUAG34 WtQCGA0YFXV/kAgPPmOvnPlwpYM2ZrVLVl5Ct2diR5QaLee3o1GiStQm0LuspRzk HSzVyCYdKRxH4zkEBzKUn/PuyYLoMRyPP4PQ3R/xlQrFqvv6FeiGYnow89+1JpUp 2qWg5vU1aLM7/WXnyVGDED3T42eZREi/uMPQIADXqRIVC7e43/eKcLF06n0lIWh9 usg= =VIBB -----END PGP SIGNATURE----- Merge tag 'remove-dma_zalloc_coherent-5.0' of git://git.infradead.org/users/hch/dma-mapping Pull dma_zalloc_coherent() removal from Christoph Hellwig: "We've always had a weird situation around dma_zalloc_coherent. To safely support mapping the allocations to userspace major architectures like x86 and arm have always zeroed allocations from dma_alloc_coherent, but a couple other architectures were missing that zeroing either always or in corner cases. Then later we grew anothe dma_zalloc_coherent interface to explicitly request zeroing, but that just added __GFP_ZERO to the allocation flags, which for some allocators that didn't end up using the page allocator ended up being a no-op and still not zeroing the allocations. So for this merge window I fixed up all remaining architectures to zero the memory in dma_alloc_coherent, and made dma_zalloc_coherent a no-op wrapper around dma_alloc_coherent, which fixes all of the above issues. dma_zalloc_coherent is now pointless and can go away, and Luis helped me writing a cocchinelle script and patch series to kill it, which I think we should apply now just after -rc1 to finally settle these issue" * tag 'remove-dma_zalloc_coherent-5.0' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: remove dma_zalloc_coherent() cross-tree: phase out dma_zalloc_coherent() on headers cross-tree: phase out dma_zalloc_coherent() |
||
|---|---|---|
| .. | ||
| controller | ||
| endpoint | ||
| hotplug | ||
| pcie | ||
| switch | ||
| Kconfig | ||
| Makefile | ||
| access.c | ||
| ats.c | ||
| bus.c | ||
| ecam.c | ||
| host-bridge.c | ||
| iov.c | ||
| irq.c | ||
| mmap.c | ||
| msi.c | ||
| of.c | ||
| p2pdma.c | ||
| pci-acpi.c | ||
| pci-bridge-emul.c | ||
| pci-bridge-emul.h | ||
| pci-driver.c | ||
| pci-label.c | ||
| pci-mid.c | ||
| pci-pf-stub.c | ||
| pci-stub.c | ||
| pci-sysfs.c | ||
| pci.c | ||
| pci.h | ||
| probe.c | ||
| proc.c | ||
| quirks.c | ||
| remove.c | ||
| rom.c | ||
| search.c | ||
| setup-bus.c | ||
| setup-irq.c | ||
| setup-res.c | ||
| slot.c | ||
| syscall.c | ||
| vc.c | ||
| vpd.c | ||
| xen-pcifront.c | ||